Cardiac Valve Surgery, Mitral Valve Prolapse Treatment
Cardiac Valve Surgery, Mitral Valve Prolapse Treatment
Valve Repair or Replacement
Blood is pumped through your heart in only one direction. Heart valves play a key role in this one-way blood flow, opening and closing with each heartbeat. Pressure changes on either side of the valves cause them to open their flap-like "doors" (called cusps or leaflets) at just the right time, then close tightly to prevent a backflow of blood.
There are 4 valves in the heart : -
* Tricuspid valve
* Pulmonary valve
* Mitral valve
* Aortic valve
In the United States, surgeons perform about 99,000 heart valve operations each year. Nearly all of these operations are done to repair or replace the mitral or aortic valves. These valves are on the left side of the heart, which works harder than the right. They control the flow of oxygen-rich blood from the lungs to the rest of the body.
If valve damage is mild, doctors may be able to treat it with medicines. If damage to the valve is severe, surgery to repair or replace the valve may be needed.
What is valve repair ?
Valve repair can usually be done on congenital valve defects (defects you are born with) and has a good success record with treating mitral valve defects.
Here are some procedures surgeons may use to repair a valve : -
* Commissurotomy, which is used for narrowed valves, where the leaflets are thickened and perhaps stuck together. The surgeon opens the valve by cutting the points where the leaflets meet.
* Valvuloplasty, which strengthens the leaflets to provide more support and to let the valve close tightly. This support comes from a ring-like device that surgeons attach around the outside of the valve opening.
* Reshaping, where the surgeon cuts out a section of a leaflet. Once the leaflet is sewn back together, the valve can close properly.
* Decalcification, which removes calcium buildup from the leaflets. Once the calcium is removed, the leaflets can close properly.
* Repair of structural support, which replaces or shortens the cords that give the valves support (these cords are called the chordae tendineae and the papillary muscles). When the cords are the right length, the valve can close properly.
* Patching, where the surgeon covers holes or tears in the leaflets with a tissue patch.
What is valve replacement ?
Severe valve damage means that the valve will need to be replaced. Valve replacement is most often used to treat aortic valves and severely damaged mitral valves. It is also used to treat any valve disease that is life-threatening. Sometimes, more than one valve may be damaged in the heart, so patients may need more than one repair or replacement.
There are 2 kinds of valves used for valve replacement : -
* Mechanical valves , which are usually made from materials such as plastic, carbon, or metal. Mechanical valves are strong, and they last a long time. Because blood tends to stick to mechanical valves and create blood clots, patients with these valves will need to take blood-thinning medicines (called anticoagulants) for the rest of their lives.
* Biological valves , which are made from animal tissue (called a xenograft) or taken from the human tissue of a donated heart (called an allograft or homograft). Sometimes, a patient's own tissue can be used for valve replacement (called an autograft). Patients with biological valves usually do not need to take blood-thinning medicines. These valves are not as strong as mechanical valves, though, and they may need to be replaced every 10 years or so. Biological valves break down even faster in children and young adults, so these valves are used most often in elderly patients.
You and your doctor will decide which type of valve is best for you.
During valve repair or replacement surgery, the breastbone is divided, the heart is stopped, and blood is sent through a heart-lung machine. Because the heart or the aorta must be opened, heart valve surgery is open heart surgery.
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